21657080

素因数分解:

$2^3\times 5^1\times {\mathrm{67}}^1\times {\mathrm{8081}}^1$

素因数の和:8159

約数の個数: 32

約数和(自身を含む): 49461840

約数和(自身を除く): 27804760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 67, 134, 268, 335, 536, 670, 1340, 2680, 8081, 16162, 32324, 40405, 64648, 80810, 161620, 323240, 541427, 1082854, 2165708, 2707135, 4331416, 5414270, 10828540, 21657080]

約数ペア:

[(1, 21657080), (2, 10828540), (4, 5414270), (5, 4331416), (8, 2707135), (10, 2165708), (20, 1082854), (40, 541427), (67, 323240), (134, 161620), (268, 80810), (335, 64648), (536, 40405), (670, 32324), (1340, 16162), (2680, 8081)]